Subversion Repositories mpmc8

`timescale 1ns / 1ps
// ============================================================================
//        __
//   \\__/ o\    (C) 2015-2022  Robert Finch, Waterloo
//    \  __ /    All rights reserved.
//     \/_//     robfinch<remove>@finitron.ca
//       ||
//
// BSD 3-Clause License
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// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
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//    this list of conditions and the following disclaimer in the documentation
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// ============================================================================
//
import mpmc10_pkg::*;

module mpmc10_set_write_mask(clk, state, we, sel, adr, mask);
input clk;
input [3:0] state;
input we;
input [31:0] sel;
input [31:0] adr;
output reg [31:0] mask;

always_ff @(posedge clk)
        tMask(256,we,sel,adr[4:0],mask);

task tMask;
input [7:0] widi;
input wei;
input [31:0] seli;
input [4:0] adri;
output [15:0] masko;
begin
if (state==PRESET2)
        if (wei)
                masko <= ~seli >> {adri[4],4'h0};
        else
                masko <= 16'h0000;      // read all bytes
end
endtask

endmodule